/*!
 * 10_patterns.cpp
 *
 * Copyright (c) 2015-2024, NADAL Jean-Baptiste. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA
 *
 * @Author:  NADAL Jean-Baptiste
 * @Date: 27/02/2024
 *
 */

/*---------------------------------------------------------------------------*/

#include <catch.hpp>

#include "raytracing.h"

using namespace Raytracer;

/* ------------------------------------------------------------------------- */

SCENARIO("Creating a stripe pattern", "[features/patterns.feature]")
{
    GIVEN("pattern <- strip_pattern(white, black)")
    {
        StripePattern pattern(Color::White(), Color::Black());
        THEN("pattern.a = white")
        {
            REQUIRE(pattern.a() == Color::White());
        }
        AND_THEN("pattern.b = black")
        {
            REQUIRE(pattern.b() == Color::Black());
        }
    }
}

/* ------------------------------------------------------------------------- */

SCENARIO("A stripe pattern is constant in y", "[features/patterns.feature]")
{
    GIVEN("pattern <- strip_pattern(white, black)")
    {
        StripePattern pattern(Color::White(), Color::Black());
        THEN("stripe_at(pattern, point(0, 0, 0) = white")
        {
        }
        AND_THEN("stripe_at(pattern, point(0, 1, 0) = white")
        {
        }
        AND_THEN("stripe_at(pattern, point(0, 2, 0) = white")
        {
        }
    }
}

/* ------------------------------------------------------------------------- */

SCENARIO("A stripe pattern is constant in z", "[features/patterns.feature]")
{
    GIVEN("pattern <- strip_pattern(white, black)")
    {
        StripePattern pattern(Color::White(), Color::Black());
        THEN("stripe_at(pattern, point(0, 0, 0) = white")
        {
            REQUIRE(pattern.stripe_at(Tuple::Point(0, 0, 0)) == Color::White());
        }
        AND_THEN("stripe_at(pattern, point(0, 0, 1) = white")
        {
            REQUIRE(pattern.stripe_at(Tuple::Point(0, 0, 1)) == Color::White());
        }
        AND_THEN("stripe_at(pattern, point(0, 0, 2) = white")
        {
            REQUIRE(pattern.stripe_at(Tuple::Point(0, 0, 2)) == Color::White());
        }
    }
}

/* ------------------------------------------------------------------------- */

SCENARIO("A stripe pattern alternates in x", "[features/patterns.feature]")
{
    GIVEN("pattern <- strip_pattern(white, black)")
    {
        StripePattern pattern(Color::White(), Color::Black());
        THEN("stripe_at(pattern, point(0, 0, 0) = white")
        {
            REQUIRE(pattern.stripe_at(Tuple::Point(0, 0, 0)) == Color::White());
        }
        AND_THEN("stripe_at(pattern, point(0.9, 0, 0) = white")
        {
            REQUIRE(pattern.stripe_at(Tuple::Point(0.9, 0, 0)) == Color::White());
        }
        AND_THEN("stripe_at(pattern, point(1, 0, 0) = black")
        {
            REQUIRE(pattern.stripe_at(Tuple::Point(1, 0, 0)) == Color::Black());
        }
        AND_THEN("stripe_at(pattern, point(-0.1, 0, 0) = black")
        {
            REQUIRE(pattern.stripe_at(Tuple::Point(-0.1, 0, 0)) == Color::Black());
        }
        AND_THEN("stripe_at(pattern, point(-1, 0, 0) = black")
        {
            REQUIRE(pattern.stripe_at(Tuple::Point(-1, 0, 0)) == Color::Black());
        }
        AND_THEN("stripe_at(pattern, point(-1.1, 0, 0) = white")
        {
            REQUIRE(pattern.stripe_at(Tuple::Point(-1.1, 0, 0)) == Color::White());
        }
    }
}